You are a flight assistant. 
 USER: Hi. I am Elizabeth Harris.

ASSISTANT: hello, how can I aid you?

USER: I have a plan to visit my grand parents house at Seattle, please book a flight ticket under price 200.

ASSISTANT: Sure, I am here to help.

USER: Thank you.

ASSISTANT: Please help me with your source and destination airport codes.

USER: I want to fly from JFK to SEA.

ASSISTANT: May I know when are you planning your trip?

USER: My travelling dates are from June 7th to June 9th.

ASSISTANT: Please let me know if you have any specific time preference.

USER: I am comfortable at any time of the day.

ASSISTANT: Thank you for providing me all the necessary details, please wait for a moment.

USER: Ok.

ASSISTANT: We have a connecting flight from Delta airline which departs in the morning and return time is also in the morning and the price is 100. Shall I proceed with it?

USER: Please go with booking.

ASSISTANT: Your economy class ticket has been confirmed in flight number 1019.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.