You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Lisa Adams. Please help me in booking a flight ticket from DFW to ATL.

ASSISTANT: Lisa Adams, I am here to help you for this. When you are willing to travel?

USER: My planned travel dates are 03/07 and 03/09.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable with any one.

ASSISTANT: Sorry to inform you, no flights are found with your criteria.

USER: That's ok, no problem.

ASSISTANT: Thank you very much for approaching us.

USER: Thank you for checking.

ASSISTANT: You are welcome.