You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Sandra Garcia. I would like to travel from DFW to ORD, could you help me out?

ASSISTANT: I would like to help you in booking your flight ticket. Could you please let me know your travel date?

USER: My preferable dates are from 01/07 to 01/09.

ASSISTANT: Sorry, there are no flights available for the given schedule.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.