You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Moore.

ASSISTANT: How can I assist you today?

USER: Can you please assist me to book a flight ticket from Las Vegas to Los Angeles?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Ok, my planned travel dates are May 22nd and May 24th.

ASSISTANT: Please mention your airport codes that you want to travel.

USER: The origin and destination airport codes are LAS and LAX.

ASSISTANT: Do you have any specifications?

USER: I am looking for a single connecting flight for my journey.

ASSISTANT: Do you have any class preferences?

USER: No, I didn't have any class preference.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

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

USER: It's ok, not a problem with that. I will choose some other source to travel. Anyways thank you for checking the flight availability.

ASSISTANT: Thanks for reaching us, have a great day.