You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: This is Donna Williams here. Can you please aid me in booking a flight ticket from LAX to DFW?

ASSISTANT: Sure, please help me with your journey dates.

USER: I would like to travel on May 29th and return on May 31st.

ASSISTANT: Ok, Do you have any depart and return timings?

USER: No.

ASSISTANT: Ok, Do you have any class preference?

USER: Yes, I will prefer to travel in business class.

ASSISTANT: Ok, May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for being patient, we did not find any flights with your given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.