You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Can you help me in booking my flight ticket from ORD to LAS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates will be Aug 9th to Aug 11th.

ASSISTANT: Do you have any connection limit?

USER: I am ok, with connecting flight.

ASSISTANT: May I know your name?

USER: I am Elizabeth Walker.

ASSISTANT: Sorry, there are no flights found with your details.

USER: Its ok, thank you.

ASSISTANT: Thank you.