You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Hill.

ASSISTANT: How can I assist you today?

USER: I need a direct flight to attend a client meeting in Seattle, so please book a flight ticket from Boston.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to fly on Aug 17, return on Aug 19.

ASSISTANT: How much you can afford for your journey?

USER: I can afford upto 1000.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: My source and destination airport codes are BOS and SEA.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no direct flights available under your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a great day.