You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Donna Green. My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: I understand your request and will be happy to help you.

USER: Thank you.

ASSISTANT: I found your previous reservation, can you please tell us your location airport codes?

USER: My source airport code is OAK and destination airport code is SEA.

ASSISTANT: Well, may I know on what dates you need booking?

USER: I would like to take off on 05/11 and return on 05/13.

ASSISTANT: Could you please be on hold for a moment while I am checking with your requested details?

USER: Make sure that the connection of flight is 0.

ASSISTANT: The AA airline with flight number 1028 is available having fare as 200 and connection as 0.

USER: Please confirm the booking.

ASSISTANT: Fine, your seat is reserved.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for consulting us, have a great day.