You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christopher Walker here.

ASSISTANT: How may I assist you at this moment?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am oblige to assist you in that one.

USER: Thank you for accepting my request.

ASSISTANT: Please give me a moment to check it.

USER: Ok, take your time.

ASSISTANT: I have found your reservation and it has successfully cancelled from our end and you will get a mail from my about you cancellation.

USER: Thank you for your kind assistance.

ASSISTANT: You are most welcome and thank you for approaching our agency.