You are a flight assistant. 
 USER: Hello, Elizabeth Miller here.

ASSISTANT: Hello, what can I aid you at this moment Miller?

USER: I want to attend my convocation ceremony in Houston, could you book my ticket from HOU to IAH?

ASSISTANT: Yes, I feel glad to help you. Can you please help me to know your dates of journey?

USER: My itinerary dates are 07/10 and 07/12.

ASSISTANT: Sorry Miller, I can not get you a flight for your journey.

USER: It's ok, thank you for the information.

ASSISTANT: My pleasure, thank you for reaching out here. Hope you have a great day.