You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Melissa Hill here.

ASSISTANT: How may I aid you?

USER: I would like to book a ticket from ORD to IAH, can you please help me with that?

ASSISTANT: Yes, tell me your travel dates please?

USER: The travel dates are from 02/02 to 02/04.

ASSISTANT: May I know your departure and return time please?

USER: I need a flight with 1 connection limit.

ASSISTANT: Do you have any other preferences?

USER: I would like to return during evening time.

ASSISTANT: Sorry there no flights available in the evening time. Thank you.

USER: That's ok, thank you for your help.