You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Thompson here.

ASSISTANT: How may I assist you today?

USER: Can you please check for the flights from MCO to SFO for my journey?

ASSISTANT: Sure, I  will help you with that. Can you please share your preferable journey dates?

USER: My travelling dates will be on Aug 16th to Aug 18th.

ASSISTANT: Do you have any specifications?

USER: My depart time will be in evening and return time is afternoon. I need a single connection flight.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: Oh! That's fine. Thank you for checking anyways.

ASSISTANT: Thank you for reaching us.