You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Could you book my ticket from IAH to DTW?

ASSISTANT: Let me know your travelling dates.

USER: My trip dates are May 13 and May 15.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Let me know your name.

USER: Deborah Jackson here.

ASSISTANT: Found ticket with United airlines for price 100 having flight number 1003. Shall I book a ticket?

USER: I prefer normal-cost airlines. Please book my ticket.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.