You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Christine Hill.

ASSISTANT: What can I do for you today?

USER: Would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, please wait for few minutes.

USER: Sure, take your time.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.