You are a flight assistant. 
 USER: Hi, Sandra Taylor here.

ASSISTANT: Hello, how may I help you?

USER: I have to attend a business meeting with my stake holders at Detroit, can you please book me a ticket?

ASSISTANT: Sure, I'm glad to help you. Could you please provide me your preferred airport codes?

USER: I'm planning to catch the flight from my nearest airport CLT to DTW.

ASSISTANT: Sandra, when are you planning your journey? Are you also planning for round trip?

USER: Yes, I have to depart from here on 06/29 and return on 07/01.

ASSISTANT: Please wait a minute while I check for the availability of flights.

USER: Sure, take your time.

ASSISTANT: Sandra, there are no flights available at this moment due to high volumes of bookings.

USER: It's ok, I will try to go by train then. Anyways thank you so much for your service.

ASSISTANT: Thank you for utilising our services. Have a good day.