You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Parker from Atlanta.

ASSISTANT: How can I assist you today?

USER: I want to go to Seattle next week, can you please book a direct flight for me?

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

USER: Thanks, I want to take off on 04/19 and book my return ticket also on 04/21.

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

USER: I want to fly from ATL and destination airport is SEA.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights available with connections 0.

USER: Oh! It's ok no problem, I will go with another airline service. Thank you for your service.

ASSISTANT: Welcome, have a great day.