You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to do some modifications in my existing reservation, can you help me in that?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, myself Raymond Allen.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, we are happy to inform you that, we found a reservation in your name. Can you share me your trip dates?

USER: Sure, my travel dates are Nov 25 and Nov 27.

ASSISTANT: May I know your airport codes?

USER: Sure, my airport codes are OAK to SEA.

ASSISTANT: Do you need any way station in your journey?

USER: Please look for a direct flight.

ASSISTANT: Do you have any other preferences?

USER: I would like to return my journey for the afternoon flight.

ASSISTANT: Sorry to inform you that, there are no flights available with your requested dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.