You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself John Martinez.

ASSISTANT: How can I help you?

USER: Can you please help me with changing my reservation?

ASSISTANT: Sure, give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok fine, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for your time.