You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my reservation, due to some problems I am unable to travel those dates, can you please change my travel dates?

ASSISTANT: Ok, may I know your name to check?

USER: Sure, my name is Christine Gonzalez.

ASSISTANT: Sorry no reservation found on your name given.

USER: Oh! May be I am not booked my ticket properly at that time.

ASSISTANT: Thank you for availing our service.

USER: Thank you for your information.