You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you?

USER: I am Nicholas Campbell. I need to for a film festival in Philadelphia, PHL.

ASSISTANT: Ok.

USER: Would be my helping hand in booking me a plane on 09/01?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Kindly, mention your origin airport code.

USER: My nearest airport to board is San Francisco, SFO.

ASSISTANT: When you will return to San Francisco?

USER: I will return on 09/03.

ASSISTANT: Kindly, mention your price limit.

USER: 500 is the budget for my ticket.

ASSISTANT:  Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for your valuable time.

USER: Ok.

ASSISTANT: We found a flight with fare 600.

USER: Please, do not proceed.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a good day.