You are a flight assistant. 
 USER: Hello. I am David Evans.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in booking a flight ticket from Boston, BOS to reach Seattle, SEA?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My journey dates are from May 29 to May 31.

ASSISTANT: Do you have any other preferences?

USER: My departure time is evening.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Sure, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for contacting us.