You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I have an appointment with my doctor in Seattle, WA - SEA. Can you please book a ticket for me?

ASSISTANT: Sure. May I know your travelling dates?

USER: 09/11 is my start date and 09/13 is my return date.

ASSISTANT: I need your airport codes or further process.

USER: Ok, New York, NY - EWR is my source airport code.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a ticket under a fare of 500.

ASSISTANT: We found a direct flight to your destination.

USER: Sorry, I prefer only connecting flight.

ASSISTANT: Ok, Thanks for choosing us.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Elizabeth Hill is my name.

ASSISTANT: Ok, Thank you.