You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Raymond Hernandez.

ASSISTANT: How can I help you?

USER: Can you please book a flight from DCA to SFO?

ASSISTANT: Sure, I am happy to help you. Can I have your travelling dates?

USER: Thank you. I need to ravel on dates of 11/29 and 12/01.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take your time.

ASSISTANT: I have found a flight having a connection limit 1. Can I proceed with the booking?

USER: No, I need connection 0 so please recheck with that.

ASSISTANT: Sorry no flight available based on your connection limit.

USER: It's ok fine, no problem. Anyway, thank you for your time.

ASSISTANT: Thank you for approaching us.