You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Lee.

ASSISTANT: Mark, how may I aid you?

USER: I am planning a trip to Seattle, SEA. Can you please book me a ticket from Boston, BOS?

ASSISTANT: Sure, please provide your journey dates.

USER: My preferable journey dates are from 11/13 to 11/15.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure, take your own time.

ASSISTANT: Delta airlines with flight 1007 is available on your route with a connecting flight.

USER: Please reserve my ticket with this airlines.

ASSISTANT: Your ticket is reserved.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.