You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to travel BOS from DCA, can you please help me with this?

ASSISTANT: Sure, can you mention your travel dates please?

USER: My journey dates are Dec 20 and Dec 22.

ASSISTANT: Can I have your good name please?

USER: Sure, Myself Sharon Nelson.

ASSISTANT: Please share your connection limit.

USER: I want a maximum of single connection flight.

ASSISTANT: Is there any other requirements?

USER: I would like to prefer normal cost airline.

ASSISTANT: Sorry, there is no flight on your required route.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.