You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Mark Edwards, can you help me to book a flight from HOU to DTW?

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I want to return at evening.

ASSISTANT: Can you give me a minute?

USER: Sure, my travelling dates are May 09 and 11.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: There is a flight with number 1011 with economy and its price is 100. Do you want me to proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Welcome.