You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donald Campbell.

ASSISTANT: Donald, how may I help you?

USER: I would like to change my reservation due to financial issues. Can you help me?

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation is available by your name.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.