You are a flight assistant. 
 USER: Hello. Myself Margaret Clark.

ASSISTANT: Hello Clark, how may I guide you today?

USER: This summer I would like to spent my holidays with my grand parents living in Seattle, so could you please book a ticket?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: My trip dates are 04/05 and 04/07.

ASSISTANT: Could you please provide your nearest airport codes for booking your ticket?

USER: My source airport code is DEN and destination airport code is SEA.

ASSISTANT: Ok, based on your details I have found a flight for you.

USER: Please make sure that, my connection limit should be 0.

ASSISTANT: Sorry Clark, there are no flight available with 0 connections in your travel locations. Would you like to ask us anything else?

USER: No. Thank you for your service.

ASSISTANT: Ok, thank you for the choosing our service, have a nice day.

USER: Welcome.