You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,.

USER: I am Edward Baker.

ASSISTANT: How may I help you now?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: That's ok, not a problem. Thank you.

ASSISTANT: Thanks for choosing us. Hope to serve you again.