You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I oblige you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Will you aid me in this?

ASSISTANT: Sure, we are here to aid you. Can I have your good name to check your reservation?

USER: Sure, my name is Eric Collins.

ASSISTANT: Please wait for some time, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for being patience. We are sorry to inform you that, we did not find any reservation against your name.

USER: Not an issue, thanks for your effort.

ASSISTANT: Thanks for approaching us, we hope to serve you again.