You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Green.

ASSISTANT: How can I aid you today?

USER: I have to attend a Music Concert at San Francisco, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you in booking flight ticket. May I know your preferable travel dates?

USER: I would like to take off on 10/08 and return on 10/10.

ASSISTANT: Can please let me know your preferable airport code names?

USER: My nearest source airport code is IAH and destination airport code is SFO.

ASSISTANT: Ok, please wait a moment, I will check flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience, no flights available as per your requested dates.

USER: That's ok, I will find an another alternate way to complete my trip.

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

USER: Thank you for the information.