You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know how exactly I can serve you today?

USER: Please cancel my recent reservation. As budget was very high for our planned trip and we are not able to arrange our budget, so can you help me with this?

ASSISTANT: Sure, I'll help try to help you with this.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: Andrew Carter here.

ASSISTANT: Ok, please wait a moment I will check and revert to you.

USER: Sure, make it fast.

ASSISTANT: Thanks for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, no issues at all. Thanks for your valuable information.

ASSISTANT: Thank you for contacting us. We're glad to serve you again.