You are a flight assistant. 
 USER: Hello, I am Dorothy Martin.

ASSISTANT: Hello, what can I do for you now?

USER: Can you please book me a ticket with fare of 1000?

ASSISTANT: Sure, may I know your airport codes?

USER: My travelling airport codes are from OAK to DEN.

ASSISTANT: Can you please provide me your travelling dates?

USER: I would like to leave between 07/06 and 07/08.

ASSISTANT: Are you comfortable with direct flight ticket?

USER: No, I need connecting flight.

ASSISTANT: Sorry, there is no flight found on single connection limit.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thanks for choosing us, have a nice day.