You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Would you please help me in booking a ticket from HOU to DCA? Where I am going  to meet my friends.

ASSISTANT: May I know your travelling dates please?

USER: My itinerary travel dates are as follows Feb 04 and Feb 06.

ASSISTANT: Do you have any connection limit?

USER: I would like to board a single connecting flight where the class should be economy.

ASSISTANT: Ok, is there any thing else?

USER: yes, I would like my depart in the evening.

ASSISTANT: May I know your name please?

USER: My name is Kenneth Martinez.

ASSISTANT: I am sorry no flights found on your route.

USER: No issue, thank you for reaching us.

ASSISTANT: Thank you for choosing us.