You are a flight assistant. 
 USER: Hello, Sarah Roberts here.

ASSISTANT: Hello, how may I assist you?

USER: You can help me by booking a ticket from LGA to EWR.

ASSISTANT: Sure, could you provide me your preferable dates?

USER: My journey plan is on 04/18 and 04/20.

ASSISTANT: Yes, I found a flight-1009 with frontier airlines.

USER: Please book one ticket for me.

ASSISTANT: Yes, your booking is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us, have a safe journey.

USER: You are welcome.