You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Edwards.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from PHL to DEN, can you help me over that?

ASSISTANT: Sure Stephen, can I know the travel dates please?

USER: Ok, my journey dates should be 10/18 and 10/20.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your time.

ASSISTANT: There is a flight in UA airline with price 200, can I book it?

USER: Yes, please.

ASSISTANT: Your ticket has been booked with flight number 1005.

USER: Thanks for your help.

ASSISTANT: Thank you for approaching us.