You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, In what way shall I assist you for the day?

USER: Can you reserve me a ticket from IAD to JFK?

ASSISTANT: Sure, may I know on what dates you prefer to travel?

USER: My journey dates are June 30 to July 02.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Samantha Parker.

ASSISTANT: Is there a connection you prefer in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other restrictions to be met?

USER: Please ensure that my depart time is evening.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.