You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Ruth Martin. I am looking for a flight from SFO to DFW, can you help me in reserving a flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: My departure and arrival dates are 06/11 and 06/13.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Ruth, I am sorry to inform you that there is no flight available at your requested dates.

USER: Oh! Sad to hear, I reach any other agency to get a best flight.

ASSISTANT: Sorry for the inconvenience. Thank you for contacting us, have a great day.