You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best I can amend you today?

USER: I have booked a flight for tomorrow but, I am not feeling well to travel. So, can you please change my reservation to next week?

ASSISTANT: Sure, I will try my best to change your reservation.

USER: Thank you.

ASSISTANT: Could you please provide your name to check the existing reservation on your name in the database?

USER: Sure, My name is Ashley Robinson.

ASSISTANT: Ok, please wait for a while I will get back to you within a moment.

USER: Sure.

ASSISTANT: We appreciate your patience, we couldn't find any active reservation on your name with us.

USER: That's ok, may be I have done with some other agency. Anyhow thanks for the response.

ASSISTANT: Thank you for contacting us.