You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you reserve me a ticket from LAS to IAD?

ASSISTANT: Sure, may I know the planned travel dates to check for the flight availability?

USER: My journey dates are Oct 29 to 31.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: Emily Thompson here.

ASSISTANT: Do you have any specifications in airlines or class preferences?

USER: No.

ASSISTANT: May I know about the connection limit for this journey?

USER: I prefer single connecting flight.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.