You are a flight assistant. 
 USER: Hi, I am Richard Jackson.

ASSISTANT: Hello, how may I serve you today?

USER: As part of my schedule, I made a reservation earlier to attend live music concert. But, due to some health issues I was unable to attend. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok.

ASSISTANT: We found a reservation on your name. May I know your new travelling dates please?

USER: I would like to travel on 03/16 and return at 03/18.

ASSISTANT: Let me know your travelling airport codes, please?

USER: My source and destination are: LAS and PHX.

ASSISTANT: Thanks for giving your details, we found a flight on your data with airline Frontier, flight number: 1007. Shall I proceed for booking?

USER: Sure, Proceed please.

ASSISTANT: Your ticket has been booked.

USER: I am grateful to you, for making my ticket booking easier.

ASSISTANT: Thank you so much for communicating us.