You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel Thomas here.

ASSISTANT: How may I guide you Daniel?

USER: I am a Doctor and I want to travel to Houston to treat my Patient who is suffering with paralysis from past two months. Can you please help me for booking the flight ticket?

ASSISTANT: Sure Daniel, I will help you in booking your ticket on your required specifications.

USER: Ok, thank you for that.

ASSISTANT: Can you provide your travelling dates on which you are preferring to travel?

USER: I would like to fly on 04/04 and return on 04/06.

ASSISTANT: May I know your nearest airport codes too so I can check for availability of flights?

USER: My airport codes are HOU and HOU.

ASSISTANT: Please hold on for a while.

USER: Ok, I will wait for your response. Make sure my connections limit is 0.

ASSISTANT: Sure hold on, I will check in my database.

USER: So sad for that. Anyway, thank you for the information.

ASSISTANT: I am sorry to say, there are no flights found on these dates.

USER: Thank you for the information.

ASSISTANT: Welcome.