You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to change an existing reservation due to postpone of my adventurous trip.

ASSISTANT: Sure, May I know your name?

USER: I am Nicole Wright.

ASSISTANT: Please wait a while.

USER: OK.

ASSISTANT: Thanks for your waiting. There was no reservation found with your name.

USER: Ok. Thank you for your response.

ASSISTANT: Thank you for contacting us.