user: Where do I write to address a customer service issue to higher management?
agent: Hi Chris. Which U.S. based card is this concerning? Please do not release any personal or card information.  Hi I never heard back from you. Let me know if I can assist. All the best.
user: It was the Delta sky miles card.
agent: Good Morning. What is this concerning and I may be able to help?
user: Signed up for new card with Delta to book immediately book tix. Card number didn't come up. Customer svce refused to help.
agent: Good morning, thanks for reaching out. Please call our New Accounts Team at 877-399-3086, for assistance. They're available, Monday - Friday 8:00 AM to 12:00 AM (ET); Saturday 10:00 AM to 6:00 PM (ET). Sorry for the inconvenience.

Signed up for an AmexCard with Delta but it didn't go through. Told to phone the new accounts team.
### Instruction: Below is a conversation between a human and an AI agent. Write a summary of the conversation.

### Input:
user: Where do I write to address a customer service issue to higher management?
agent: Hi Chris. Which U.S. based card is this concerning? Please do not release any personal or card information.  Hi I never heard back from you. Let me know if I can assist. All the best.
user: It was the Delta sky miles card.
agent: Good Morning. What is this concerning and I may be able to help?
user: Signed up for new card with Delta to book immediately book tix. Card number didn't come up. Customer svce refused to help.
agent: Good morning, thanks for reaching out. Please call our New Accounts Team at 877-399-3086, for assistance. They're available, Monday - Friday 8:00 AM to 12:00 AM (ET); Saturday 10:00 AM to 6:00 PM (ET). Sorry for the inconvenience.

### Response:
Signed up for an AmexCard with Delta but it didn't go through. Told to phone the new accounts team.