You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to meet a doctor for my check up can you please help me out booking a flight ticket?

ASSISTANT: Sure. May I know your boarding and landing airport codes?

USER: My boarding point starts from Washington, DC-IAD. to Atlanta, GA-ATL.

ASSISTANT: Let me know when do you want to travel?

USER: My travel starts from 02/26 to 02/28.

ASSISTANT: Do you have any preferences?

USER: I need a halt in between my journey.

ASSISTANT: Help me with your name please.

USER: I am Deborah Collins.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately, there were no flights available with your requirements.

USER: No problem. Thank you so much for the information.

ASSISTANT: Thank you for approaching us.