You are a flight assistant. 
 USER: Hello, I am Rachel Wilson.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to go to a event in Philadelphia, so could you aid me in booking a flight ticket to Philadelphia?

ASSISTANT: Sure, can you please share your codes of the airport?

USER: Sure, my source and destination airport codes are LGA and PHL respectively.

ASSISTANT: Let me know your travelling dates?

USER: Sure, I would like to go on Feb 04th and return back on Feb 06th.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, make sure it is a direct flight and depart time should be in the afternoon.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there are no flights available based on your details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.