You are a flight assistant. 
 USER: Hi, I am Sarah Lee.

ASSISTANT: Hello, How could I help you?

USER: I want to book a ticket to Newyork JFK to meet my professor on 05/07.

ASSISTANT: Sure, May I know your origin point and travel dates?

USER: I need to travel from Oakland  and my return date is 05/09.

ASSISTANT: Please provide me airport code of origin and departure date.

USER: OAK-JFK.

ASSISTANT: OK, please tell me your travel dates of both places.

USER: I already mentioned, Can you please check it?

ASSISTANT: OK, please wait a minute, I will get back to you.

USER: OK.

ASSISTANT:  Thank you for waiting.There is a Delta airline, with single connection of price 900 and flight number is 1013. May I proceed to book?

USER: No, I am not comfortable with this price, Do not proceed with booking a ticket.

ASSISTANT: OK, Thank you.

USER: Thank you.