You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emily Clark.

ASSISTANT: How may I assist you for today?

USER: Can you please help me in booking a flight ticket to LAX from DFW?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My travelling dates are from Nov 4th to Nov 6th.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight. I would like to return in the evening.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.