You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from LAS to IAH?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: My travelling dates are May 8th and May 10th.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with single connection.

ASSISTANT: May I know your name?

USER: Dorothy Johnson.

ASSISTANT: OK, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for approaching us.