You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Young.

ASSISTANT: How can I help you?

USER: I am planning to visit Central Park at New York, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I'll help you in that. May I know your travel dates please?

USER: I would like to take off on 08/13 and return on 08/15.

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

USER: My source airport code is PHL and destination airport code is EWR.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your time.

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

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for the information.