You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Wright here.

ASSISTANT: How can I assist you today?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Las Vegas on 02/13?

ASSISTANT: Sure, will you mention your airport codes please?

USER: Thank you. I will prefer LAS and HOU as my origin and destination airport codes respectively.

ASSISTANT: Please mention your return date.

USER: Sure, I would like to return on 02/15.

ASSISTANT: Please give me a moment.

USER: Ok, take your time but try to bring best flight in my route.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to reach there. Thank you for the information.

ASSISTANT: Welcome, have a great day.