You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, this is one of the best agency providing booking service, solves all the queries of customer instantly, how may I help you?

USER: Myself Timothy King.

ASSISTANT: Hello King.

USER: I would like to change my reservation, can you help me for that?

ASSISTANT: Sure, I will help you out. Sorry, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.