You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Sure, let me know your good name to proceed further.

USER: Sure, I am Kevin Parker.

ASSISTANT: Give me sometime to check and revert to you.

USER: Sure, take your time.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found matching your name.

USER: Oh! may be booking not done properly. Thanks for the information.

ASSISTANT: Thank you for consulting us.