You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Rodriguez. Owing to an emergency, I need to cancel my recent reservation.

ASSISTANT: How may I help you Donald?

USER: Can you help me out?

ASSISTANT: Yes, I will definitely help in that cancelling. Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, I had found your reservation and successfully your ticket booking is cancelled.

USER: Thank you for helping me out.

ASSISTANT: Thank you for your valuable time in reaching our agency, have a nice day. You are welcome.