You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a flight ticket from DTW to HOU.

ASSISTANT: Sure, when are you planning to travel?

USER: My travel dates are from May, 07 to May, 09.

ASSISTANT: Do you need a connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preferences with the class?

USER: I prefer an economy class to fly.

ASSISTANT: Can I know your good name?

USER: I am Laura Lewis.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.