You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Hall.

ASSISTANT: Hall, how can I help you today?

USER: Can you help me to book a flight from DTW on 07/07?

ASSISTANT: Sure, I am here to help you, may I know your destination airport code?

USER: My preferred airport code is LGA.

ASSISTANT: When you are going to return to your source airport code?

USER: I would like to return to DTW on 07/09.

ASSISTANT: Sorry for the inconvenience, no flight as per your details.

USER: No issues. Thank you for your time.

ASSISTANT: It's my pleasure, have a nice day.