You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Would you please help me in  booking a ticket from JFK to SFO where I have a meeting to attend.

ASSISTANT: Sure, could you please provide your journey dates?

USER: My itinerary travel dates are as follows May 19 and May 21.

ASSISTANT: Are you looking for any preferred connections?

USER: I would like to board a single connecting flight where the class should be economy.

ASSISTANT: Do you have any other specifications to be met?

USER: And airline should be of normal cost.

ASSISTANT: May I know your name to proceed further?

USER: Brian Phillips.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: No issue. Thank you for the time.

ASSISTANT: Thank you for reaching us.