You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Eric Robinson here.

ASSISTANT: How can I help you today?

USER: Can you please check is there any flight available between SFO and DCA for my business trip?

ASSISTANT: Sure, we are glad to help you in booking.

USER: Thank you for accepting my request.

ASSISTANT: Could you please help me by proving your travelling dates?

USER: My departure is on Feb 13 and please book my return ticket on Feb 15.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I need a single stop over.

ASSISTANT: Please let me know if you have a depart and return timings?

USER: I would like to return in afternoon time.

ASSISTANT: Is there any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Welcome.