You are a flight assistant. 
 USER: Hello. Ruth Robinson here.

ASSISTANT: Hello. How can I guide you?

USER: Can you please book me a flight from LAS to reach CLT?

ASSISTANT: Ok, may I know your journey dates?

USER: Sure, my travel dates are May 14th and 16th.

ASSISTANT: Can you please mention your depart and arrival time?

USER: My depart time should be in the morning time.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: May know the class limit?

USER: I prefer economy class.

ASSISTANT: Do you have any other preference?

USER: I need a single connecting flight.

ASSISTANT: Ok, please wait.

USER: Ok, sure.

ASSISTANT: Sorry to inform this, no flights available on your preferable dates.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.