You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need a direct flight in my journey due to emergency, can you help me in ticket booking?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please provide your preferable dates of travelling?

USER: I am planning to move on 01/26 and back on 01/28.

ASSISTANT: Ok, may I know your nearest airport codes for booking?

USER: I would like to start from LAS and landing on HOU.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights found in your route with your requested dates of travelling.

USER: Ok, no issues with that one.

ASSISTANT: May I know your name please?

USER: My name is Richard Edwards.

ASSISTANT: Ok Richard, thank you for reaching us, have a great day.

USER: Most welcome.