You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please help me in booking flight ticket from ORD to LAX.

ASSISTANT: What are your trip dates?

USER: My trip dates are Jan 25 to Jan 27.

ASSISTANT: Do you need any connections?

USER: I need a connecting flight.

ASSISTANT: Are there any other preferences?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your name?

USER: Jason Parker.

ASSISTANT: Sorry, there is no flight found under your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.