You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Mark Jones, want to travel from IAD to SFO.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 09/15 to 09/17.

ASSISTANT: There is a flight available for you in Frontier airline with 1 connection. Shall I proceed with the booking?

USER: Yes, please.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Welcome.