You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Kevin Campbell.

ASSISTANT: How may I aid you at this moment?

USER: I am planning to attend convocation meeting at Philadelphia, can you please help me with booking a flight ticket?

ASSISTANT: Yes, I will help you. Could you please provide me your airport codes?

USER: My source airport code is PHX and the destination airport code is PHL.

ASSISTANT: Ok, in which dates you are willing to travel?

USER: Sure, I would like to take off on 01/08 and return back on 01/10.

ASSISTANT: Ok, please wait a minute.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry to inform you, there are no flights running in the dates which you have given.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: You are welcome.