You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a ticket from IAH to DCA. Could you book a ticket?

ASSISTANT: Sure, please share your journey dates?

USER: Travel dates are from Feb, 1 to Feb, 3.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Let me know your airline preference?

USER: I prefer normal-cost airline.

ASSISTANT: Any other requirements to be met?

USER: I would like to depart in the morning.

ASSISTANT: May I know your name?

USER: My name is Kevin Walker.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you.

ASSISTANT: Thank you for reaching us.