You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this moment?

USER: Can you help me in changing my recent reservation, as my interview is preponed?

ASSISTANT: Sure, I am here to help you. May I know good name please?

USER: I am Catherine Robinson.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: We found a existing reservation found on your name in our records, can I have your new travelling dates please?

USER: My journey dates are Feb 20 to Feb 22.

ASSISTANT: Do you need any lay by in between the journey?

USER: I am looking for a stop over flight.

ASSISTANT: Ok, please tell me me your corresponding airport codes.

USER: My source is OAK and destination is PHL.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Do you prefer business class or economy class?

USER: No.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: We found a 1015 Southwest airlines with fare of 100 and a break in between the journey matches your schedule. Can I proceed with booking?

USER: You can reserve it.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.