You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from JFK to DCA.

ASSISTANT: Sure, when do you want to travel?

USER: My journey dates are from July, 03 to July, 05.

ASSISTANT: Ok, May I know your connection limit?

USER: I want single connection.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, Is there any other preferences?

USER: My return should be in the morning.

ASSISTANT: Thank you for providing details, we did not find any flights with your given details.

USER: Ok, no problem.

ASSISTANT: May I know your name?

USER: Mark Jones here. Thank you for checking.

ASSISTANT: Ok, Thank you for opting us.