You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Nancy Smith. Can you help me in booking my flight ticket from SFO to IAH?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates?

USER: My trip dates will be Apr 19 to 21.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.