You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Suddenly I got a call from my team lead that there is an important meeting. So, I don't have any other option to travel. Can you please help me in changing the ticket?

ASSISTANT: Ok, can you please wait for a moment.

USER: Sure.

ASSISTANT: May I know your good name?

USER: Yes, I am Timothy Baker.

ASSISTANT: Sorry to tell you, there is no active reservation found under your name.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for choosing us Baker. Have a safe journey.