user: When you have been waiting 3+ hours for a maintenance crew from another airport 🙄 Hands down THE worst airline experience I’ve ever had.
agent: We'd like to check on an update for you. What's the flight number?
user: 4412. It’s been pushed back about 4 times now, so I don’t know how much of an “update” there will be.
agent: Our latest is showing an estimated departure time of 7p. We also have a great link to keep an eye on it here:
user: We’re not even boarding yet. Still no crew. Ridiculous. Now 7:35
agent: We can send updates to your phone as well, by signing up here:

The customer is complaining that he has waiting from past 3 hours for a maintaince crew. The agent says that they will send updates to the customer.
### Instruction: Below is a conversation between a human and an AI agent. Write a summary of the conversation.

### Input:
user: When you have been waiting 3+ hours for a maintenance crew from another airport 🙄 Hands down THE worst airline experience I’ve ever had.
agent: We'd like to check on an update for you. What's the flight number?
user: 4412. It’s been pushed back about 4 times now, so I don’t know how much of an “update” there will be.
agent: Our latest is showing an estimated departure time of 7p. We also have a great link to keep an eye on it here:
user: We’re not even boarding yet. Still no crew. Ridiculous. Now 7:35
agent: We can send updates to your phone as well, by signing up here:

### Response:
The customer is complaining that he has waiting from past 3 hours for a maintaince crew. The agent says that they will send updates to the customer.