You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: Ok, may I know your name please I need to check with my records of reservation?

USER: Myself David Johnson.

ASSISTANT: Ok, thank you for waiting I had found the reservation. May I know the travel airport codes?

USER: My airport codes are from DEN to LGA.

ASSISTANT: Ok, please may I know the travel dates of your journey you want to change into?

USER: My travel dates are 10/08 and 10/10.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with 1 connecting flight and the flight is 1025. Can I book?

USER: Yes, please.

ASSISTANT: The flight is booked and the price of the ticket is 100.

USER: Thank you for your help.

ASSISTANT: Thank you for connecting with our agency. The amendment is done.