You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: As my trip got postponed due to bad weather at my destination place, can you help me in doing some changes on my existing reservation?

ASSISTANT: Please let me know your name?

USER: Sure, my name is Christine Allen.

ASSISTANT: Ok. No reservation found for changing reservation.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks.