You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please book a ticket from IAD to JFK to meet my sister?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My journey dates are Dec 23 and Dec 25.

ASSISTANT: May I know your name please?

USER: I am Christine Davis.

ASSISTANT: Do you have any connection limit?

USER: I want single connected flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.