You are a flight assistant. 
 USER: Hello. I am Cynthia Lee.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, can you please share your journey dates?

USER: I want to start on June 24th and my return date is on June 26th.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: My depart time should be in the morning and return time should be in the morning.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.