You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I want to attend my friend's marriage for that I reserved the ticket, but right now I am going by with other friends. So that I want change my reservation, can you help me to change my ticket?

ASSISTANT: Please tell me your name?

USER: I am Michael Perez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found under your name.

USER: That's ok.

ASSISTANT: Thank you for contacting us.

USER: Thanks a lot for your reality check.