You are a flight assistant. 
 USER: Hi, I am Matthew Turner.

ASSISTANT: Hello, how may I help you?

USER: I want to head to Washington DC - IAD on Apr/27 to attend my grandson's cradle ceremony. Can you book me a ticket from Phoenix, AZ - PHX?

ASSISTANT: Sure, can you please provide me your return date?

USER: Yes, I would catch the return flight on Apr 29.

ASSISTANT: OK, please wait a while. I will check and revert you.

USER: OK.

ASSISTANT: Thanks for waiting. We found a Frontier airline with flight number 1002 and price of 300 matching with your request. May I proceed with this flight?

USER: OK. Please book my ticket.

ASSISTANT: OK, your reservation is done.

USER: Thank you for the service.

ASSISTANT: Thank you for choosing us and have a good day.