You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am planning to attend my nephew birthday in Dallas, so please help me in booking a flight ticket from Houston.

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to fly on 07/09 and return on 07/11.

ASSISTANT: Could you please share your airport codes?

USER: My airport codes are TX - IAH, TX - DFW.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: There are no flights available on your requested dates. Can I have your good name please?

USER: I am Amanda Walker.

ASSISTANT: Thank you for reaching us.