You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This side David Nelson.

ASSISTANT: How can I assist you today?

USER: Can you please help me in flight ticket booking?

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

USER: I have planned my dates on 12/01 and back to my home town on 12/03.

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

USER: I have to start from ATL which is my home town and I would like to land on SEA which is my destination.

ASSISTANT: Please give me a moment.

USER: Sure,  I will wait for your reply.

ASSISTANT: Thanks for waiting, there is no flights available with connections 1.

USER: Ok, thank you for your service and searching.

ASSISTANT: Welcome, have a great day.