You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Emily Thomas. Can you please help me in booking a flight ticket from LAS to EWR?

ASSISTANT: Sure, please share me your trip dates.

USER: I would like to fly on Mar 16 and return on Mar 18.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I would like to return in the evening time.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a single connection.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for communicating with us.