You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rachel Moore.

ASSISTANT: Is there emergency that I can help you out right now?

USER: Can yuo help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: I have checked based on your request but I am unable to find your previous ticket booking found under the name that you have give us.

USER: That's ok, thank you for checking.

ASSISTANT: It's my pleasure and thank you for reaching us.