You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER:  Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me with changing my ticket?

ASSISTANT: Sure, I will always be there to help you.

USER: Thanks for considering my request.

ASSISTANT: May I know on which name the ticket has been reserved?

USER: Sure, Rebecca Thomas is my name.

ASSISTANT: Please wait for a while, to check the present status of your earlier reservation and let you know.

USER: Ok, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: My pleasure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's ok, You have done a great job.

ASSISTANT: Is there any other help that I can do for you?

USER: No, I donot want any help right now. Anyway, thanks for asking. Thank you for your extendable service.

ASSISTANT: Thank you for opting us. Have a blissful day!.