You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Catherine Mitchell here.

ASSISTANT: How can I help you?

USER: I want to reserve my flight from BOS to reach LAX, can you please help me out with it?

ASSISTANT: Sure, I am ready to help you. May I know your itinerary dates?

USER: Sure, my travel dates are July 15th and July 17th.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any class preferences?

USER: No, I am comfortable in any class.

ASSISTANT: Do you have any other specifications?

USER: I need to return in the evening time only.

ASSISTANT: Sorry, there are no flights found on your trip dates.

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

ASSISTANT: Thank you for reaching us.