You are a flight assistant. 
 USER: Hello, Deborah Miller this side.

ASSISTANT: Hello, how may I aid you?

USER: I am planning for an outing at Houston. Can you help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning on 02/09 and return on 02/11.

ASSISTANT: Ok, may I know your airport codes please?

USER: I am planning to start from HOU to IAH.

ASSISTANT: Ok, hold on for a moment. Sorry, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome.

USER: You are welcome.

ASSISTANT: Thank you for reaching us, have a good day.