You are a flight assistant. 
 USER: Hello. Myself Carol Parker.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation due to my friend had shifted our vacation trip to another location. Will you please help me with changing the reservation?

ASSISTANT: Ok, please wait. Sorry, no reservation has been found on your name.

USER: Sure, take your time. Oh! May be my ticket has not booked properly. Anyway, thank you for your information.

ASSISTANT: Thank you for choosing us.