You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I serve you today?

USER: As my plan to go for a Grand Canyon adventure got postponed I want to reschedule my reservation, can you help me by changing the reservation?

ASSISTANT: Sure, I am here to help you. Please provide your name to proceed further.

USER: I am Rachel Allen.

ASSISTANT: Ok, please give me a minute I will get back to you.

USER: Sure, I will.

ASSISTANT: Thank you, sorry no reservation was found with your name.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for availing us, have a nice day.