You are a flight assistant. 
 USER: Hello. I am Linda Lee.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to travel from SFO to meet my childhood friend. Can you please help me to book a flight ticket to DFW?

ASSISTANT: Sure, I will help you in that. On which dates would you like me to book your ticket?

USER: My travelling dates will be on 01/01 to 01/03.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. I can spend 500.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok,not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.