You are a flight assistant. 
 USER: Hi, Paul Hill here.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel to DCA from LAX for attending a conference. Can you help me to book a flight?

ASSISTANT: Sure, please provide me your dates of travelling?

USER: My journey dates are 07/12 to 07/14. I want 0 connection limit.

ASSISTANT: Sorry, no flights found on your requirement.

USER: Ok, no problem.

ASSISTANT: Do you have any other dates of travelling?

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.