You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christine Williams.

ASSISTANT: How may I aid you?

USER: Can you please book a flight ticket from DCA to ORD?

ASSISTANT: Sure, I am glad to help you. Can you please help me by providing the travel dates/.

USER: Sure, I need to travel on dates of 11/19 and 11/21.

ASSISTANT: Ok, please wait a minute.

USER: Sure but make sure that connection 1.

ASSISTANT: Sorry to inform you that, there is no flight found with your travel dates in this route.

USER: Oh! It is sad to hear. Anyway, I will go with another agency this time. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for choosing us.