You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Campbell.

ASSISTANT: How can I aid you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure Thomas, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your help.