You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Hernandez here.

ASSISTANT: How may I help you?

USER: I want to travel from SFO to DFW for my business trip, can you please help me out with that?

ASSISTANT: Robert Hernandez, please tell me your travelling dates.

USER: Sure, I am planning to move on 07/12 and please book my return ticket also on 07/14.

ASSISTANT: Ok, please give me a moment to check with availability.

USER: Ok, take your time.

ASSISTANT: Sorry to tell you, there are no flights available for you.

USER: Oh! Sad to hear that.

ASSISTANT: Thank you for consulting with our agency.

USER: Anyway, thank you for the information.

ASSISTANT: Have a nice day.