You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please check the flight availability in economy class?

ASSISTANT: Sure, I am here to help you. Please let me know your travelling dates.

USER: My travelling dates are Oct 19 and Oct 21.

ASSISTANT: Kindly mention your respective airport codes.

USER: My source is SEA and destination is PHX.

ASSISTANT: Do you prefer any break in between journey?

USER: I need a single connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I want to return in the evening.

ASSISTANT: May I know your good name?

USER: I am David Moore.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1012. Shall I proceed with this flight?

USER: Ok, proceed.

ASSISTANT: Your booking is done in United Airlines.

USER: Thank you.

ASSISTANT: Thank you for availing us.