You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Sure, may I know your name?

USER: Myself Larry Brown.

ASSISTANT: We found a reservation on your name, can you please share your trip dates?

USER: Sure, I would like to go on Aug 10th and return back on Aug 12th.

ASSISTANT: May I know your source and destination airport codes?

USER: My source and destination airport codes are CLT and PHL respectively.

ASSISTANT: Do you need a connection in between your journey?

USER: I don't have any connection preferences.

ASSISTANT: Ok, please stay online.

USER: Ok, make sure the depart time is in the morning and return time is in the afternoon.

ASSISTANT: Ok. Sorry, there were no flights found with your given timings.

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

ASSISTANT: Thank you for choosing us.