You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a ticket from DTW to HOU. Could you book a ticket?

ASSISTANT: Can I know your journey dates?

USER: Departure is Apr, 11 and return date is Apr, 13.

ASSISTANT: Can I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other preference?

USER: I would like to depart in the morning time.

ASSISTANT: Tell me your name please?

USER: My name is Jessica Roberts.

ASSISTANT: Sorry, no flights available on your route.

USER: Thank you.

ASSISTANT: Thank you for reaching us.