You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Nelson.

ASSISTANT: Ruth Nelson, how may I aid you?

USER: I am planning to travel from HOU to LAS, can you please help me in flight booking?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I will start on June 23, return on June 25.

ASSISTANT: Do you have any specifications?

USER: My return time should be evening. And I want a flight with one connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.