You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I am David Clark here, I want to reserve my ticket from DFW to DTW, can you please help me in booking?

ASSISTANT: Sure, we are here to help you.

USER: Sure, my planned dates of journey are from Jul, 19 to Jul, 21.

ASSISTANT: Do you need any break in your journey?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: There is a connecting flight with fare of 100 and 1020 flight number. Shall I reserve this for you?

USER: Ok, please proceed with this booking.

ASSISTANT: Your seat has been reserved with Delta Airlines in economy class.

USER: Thank you for your service in booking my ticket.

ASSISTANT: Thank you for availing us.