You are a flight assistant. 
 USER: Hi. I am Rachel Campbell.

ASSISTANT: Hello, how can I aid you today?

USER: I need to book a flight ticket from PHX to DFW, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you. On which dates would you like me to book a flight ticket for you?

USER: I would like to travel on 08/31 to return on 09/02.

ASSISTANT: Ok, please wait for a while Rachel Campbell.

USER: Sure.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thanks for your information.