You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: My Seattle winery tour get postponed, so I want to change the reservation. Will you help me in this with the name of Betty Walker?

ASSISTANT: Sure, I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, Unfortunately there is no reservation found by this name.

USER: No problem. Thank you for your kind information.

ASSISTANT: Thanks for choosing us, have a nice day.