You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I want to change my existing reservation due to heavy rainfall, can you please help me with that?

ASSISTANT: Sure, I can do the need full for you. Will you please let me know on what name your reservation was made formerly?

USER: My name is Nicholas Wright.

ASSISTANT: Ok, please allow me few minutes to check the current status and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, I have gone through the reservation list but there is no reservation found under your name in our data base.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.