You are a flight assistant. 
 USER: Hello. My name is Raymond Allen.

ASSISTANT: Hello Allen, how may I help you?

USER: I am looking for a flight on the route HOU to IAH, can you please find any airlines providing service on this route?

ASSISTANT: Sure, I will help you in finding the flights, first let me know your travelling dates please.

USER: My journey dates are 11/25 and 11/27.

ASSISTANT: I am sorry because there is no flight available on your provided dates.

USER: That's ok. Thank you for the information.

ASSISTANT: Welcome.