You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: I am Betty Martin.

ASSISTANT: Betty, how can I serve you?

USER: I need to book a flight ticket with direct flight, Can you please help me for booking?

ASSISTANT: Sure, we are here to help you. On which dates you want me to book your ticket?

USER: I would like to travel on 04/06 to return on 04/08.

ASSISTANT: Ok, please share me your airport codes.

USER: My source point is CLT to SEA.

ASSISTANT: Ok, let me check the availability of direct flights.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say you Betty that there is no flight available on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for consulting us.