You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Mary Martin from Philadelphia.

ASSISTANT: Yes, Mary.

USER: I have to attend a business meeting in Charlotte next week. Can you please book a flight ticket for me?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: Thank you for your positive response, I want to take off on 02/29 and please confirm my return ticket also on 03/02.

ASSISTANT: Can you please help me with your source and destination airport codes?

USER: I would like to fly from PHL and destination airport is CLT.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time and find a best flight for me.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: Oh! It's ok no problem, I will contact another airline agency. Thank you for your information.

ASSISTANT: Thank you for choosing us.