You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Phillips.

ASSISTANT: Carol, how may I assist you today?

USER: I am planning to book a ticket from HOU to IAD. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I will help you in booking, please share your travelling dates?

USER: I would like to travel on 01/16 and return back on 01/18.

ASSISTANT: Sorry for the inconvenience, no flights as per your details.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.