You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Larry Martinez. I want to visit San Francisco city, so I need a flight ticket. Can you please find a flight from IAH to SFO?

ASSISTANT: I will help you with that, can you please mention your journey dates?

USER: My journey dates are 05/01 and 05/03.

ASSISTANT: Please wait for a minute.

USER: Ok, I am comfortable to travel in a single connecting flight. So, please check for that.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: It's ok, thank you so much for checking.

ASSISTANT: Thank you for reaching us.