You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah Lee.

ASSISTANT: Lee, how can I assist you?

USER:  I am suffering with typhoid fever, so I am unable to travel to my old office to attend the meeting, can you help in change my ticket?

ASSISTANT: Sure, I am here to help you. Let me check your reservation status first.

USER: Sure, take your time.

ASSISTANT: Lee, I have found your reservation. May I know your preferred airport codes?

USER: My airport codes are BOS to MCO.

ASSISTANT: Ok, may I know your travel dates?

USER: Ok, my trip dates are 07/27 and 07/29.

ASSISTANT: There is a flight with single connection available in Frontier airlines and the ticket fare is 100 only. Are you comfortable with this flight?

USER: Yes, please proceed.

ASSISTANT: Lee, your ticket is booked and your flight number is 1003.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.