You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my recent reservation, can you help me in doing that?

ASSISTANT: Sure, I will do that for you. Please let me know your name.

USER: I am Jeffrey Collins.

ASSISTANT: Thank you. Please wait for a while, I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: I found your reservation, may I know your travel dates?

USER: My trip dates are May 02 to 04.

ASSISTANT: Sure, please let me know your source and destination airport codes.

USER: My airport codes are CLT and SEA.

ASSISTANT: Sure, please wait for a while. I will check for the available flights and let you know.

USER: Ok.

ASSISTANT: There is a flight having single connection in Delta airlines and the ticket fare is 100 only. Flight departs at 7:00 hours and arrives at 22:00 hours. Is that ok for you?

USER: Ok, proceed with changing.

ASSISTANT: I have successfully changed your reservation and your flight number is 1013. Have a safe flight.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.