You are a flight assistant. 
 USER: Hello, I am Sharon Moore.

ASSISTANT: Hello, how may I assist you?

USER: I have planned a adventures trip with my friend's but unfortunately my trip got postponed. Can you help me in changing my existing resevation?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: I regret, no reservation exists by name Sharon Moore.

USER: That's alright, not an issue.

ASSISTANT: Thanks.

USER: Thank you for your information.