You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to celebrate my birthday in Phoenix, so please book a flight ticket from PHL to PHX.

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on Jan 13, return on Jan 15.

ASSISTANT: Please share me your depart and return time.

USER: I am comfortable with any time.

ASSISTANT: On which name do you like to reserve?

USER: My name is Virginia Robinson.

ASSISTANT: Do you have any other specifications?

USER: I want business class flight ticket.

ASSISTANT: Sorry, there is no flight on your details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing.