You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to attend music concert at LGA, can you please help me with booking a flight ticket from LAS?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I would like to take off on May 27 and return on May 29.

ASSISTANT: Do you have any other preferences?

USER: I would like to return during evening time.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Can I know your name?

USER: My name is Sandra Allen.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no issues, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.