You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Deborah Robinson. Can you please help me in booking the flight ticket from LGA to SFO with single connection?

ASSISTANT: Sure, please provide your travel dates.

USER: My travelling dates are 19 and 21 of Sep.

ASSISTANT: Do you have any preferences?

USER: I would like depart in the afternoon.

ASSISTANT: Sorry, I did not find any flights for you.

USER: It's ok, not a problem, thank you.

ASSISTANT: Than you for reaching us.