You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. In which way I can aid you today?

USER: I am Jeffrey Perez. Can you please help me in reservation in economy class?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: My journey dates are on Feb 18th and 20th.

ASSISTANT: May I know your airport code names for further process?

USER: My airport codes are, BOS to IAH.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I would like to depart in the evening.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I usually prefer connecting flight.

ASSISTANT: Is there any additional preferences do you have?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.