You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Myself Betty Taylor.

ASSISTANT: Glad to meet you Betty Taylor.

USER: I would like to celebrate Christmas with my family at Chicago, please book a flight from DCA to ORD.

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your preferable dates of travelling?

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

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Please hold on a moment.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us, hope you have a great day.