You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am a volunteer at Saving Grace Orphanage at Austin, TX - AUS. Can you help me out in booking a ticket?

ASSISTANT: Sure, we are happy to service you. Will you please mention your preferable travelling dates?

USER: I want to fly on 05/18 and return on 05/20.

ASSISTANT: Ok, where you want to start your journey?

USER: I want to start from Boston, MA - BOS.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were available based on your schedule.

USER: Ok, no issues.

ASSISTANT: May I know your name please?

USER: Thanks for your service. I am Sharon Hall.

ASSISTANT: Thanks for choosing us Sharon Hall.

USER: Thank you.