You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a flight ticket from SFO to LAS?

ASSISTANT: Sure, please provide your trip dates.

USER: Ok, please book a ticket for the dates June 17 and 19th respectively.

ASSISTANT: May I know your connection limit?

USER: Ok, please book a ticket for the flight which has single connection limit.

ASSISTANT: Which class do you prefer?

USER: Any class is ok for me.

ASSISTANT: May I know your name?

USER: Ok, please book a ticket on the name Michelle Johnson.

ASSISTANT: Please wait for a while.

USER: Ok, please take your own time.

ASSISTANT: Sorry Michelle Johnson, no connecting flight is available on your route.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for contacting us.